Improved smelting-furnage



. proper.

ELIPHALT HALL, OF MGRIAH, NEW YORK.

llVlPROl/ED SMELTINGFURNACE..

Specification i'oimin g part of Letters Patent No. 412.4 W). dated April23, 1864.

To all "whom, it may concern:

Be it known that I, ELIPHALET HALL, of Moriah, in thel county koi' Essexand State of New York, have invented a new and Improved SmeltingFurnace;and I do hereby declare the following lto be a full and exactdescription of `the same, reference being had to the accompanyingdrawings, making part of this specilica-v tion, in Whic Figure l is aplan of myV improved furnace. Fig. A2 is a vertical longitudinal sectionin the line x Fig. l. Fig. 3 is an elevation. Fig. 4 is a verticalsection in the` line y y, Fig. l. Fig. 5 is ahorizontalsection in theline z e, Fig. 3. Fig. v6 is an elevation of the furnace Fig. 7 is ahorizontal section in the line w w, Fig. 61 e Similar letters ofreference indicate corresponding parts in the several figures. v

By the mechanical arrangement or combination of parts which constitutesthe present invention means are provided whereby wood may beeffectuallyemployed as the heating medium in the process of smelting, it beingimpracticable to employ i'uel of this character in smelting-furnacesconstructed aftenthe plans hitherto devised, by reason ofthe deleteriouseffeet produced by the opening of the oven door or doors to supply fuel,which opening of the doors would of necessity have to be of frequentrecurrence, in consequence ofthe rapiditywith which the wood isconsumed; hence coal, from its more substantial nature, has been almostexclusively made use of as fuel. My invention, besides obviat-ing theabove diiiculty, admits of a most economical `use of heat, and theadvantageous employment of gaseliminated from the wood before the latteris deposited in the oven, all as will be hereinafter fully explained.

In order that others skilled in the art to which my invention appertainsmaybe enabled tofully understand and use the same, I willv proceed todescribe its construction and opera tion.

In the accompanying drawings, A repre'l sents thesmelting-furnaceproper, in one end of which is located the fire-grate A.The ore to be smelted may be introduced into the furnace throughopenings which are closed by the sliding doors a a, and the furnacemaybe sup, lported at a sufficient height to allow molds to be placedbeneath it, in order thatthe iron will runoff as extracted' from the oreand be formed into pigs in customary manner.

a representsa door which renders the grate accessible for the 'purposeof kindling the fire or removing the uncousumed products of combustion.

B represents a fuel departmentor oven, which v` occupies 4a positionabove the furnace A, and rests at one end upon the furnace A at a pointdirectly over the fire-grate A', at which point the ovenB communicateswith the interiorof the furnace through the throat B2. The throat B?. isopened or closed by a hinged door or valve, B3, which may be operated bya, compound lever, B, through the medium of a jointed rod, b, and linkb. s l-Vithin the oven B is mounted au endless chain, 0which is providedwith a continuous series of arms, c, between which is placed the wood tobe depositcd on the nre-grate A. e

The chain() issupported and turned or rotated by means of cast wheelsC', which engage with the links in the manner shown, and which are keyed,upon and revolved by shafts c c', one of which protrudes through theside of the oven for the reception of a wrench, C, whereby the chainmaybe rotated, so las to cause its upper portion, upon which/the wood isdeposited,to move horizontallyin the direction of the throat B2. rlhearms c may be placed at such distance from each other that each spacebetween the links will be sui.- ciently large to contain the requisitecharge or quantity of wood to be supplied to the fire at properintervals to maintain the desired dcgree of heat in the furnace.

To one end of the head of the compound lever B* is jointed a rod, D,which connects with a link, D', the latter being adapted to rotate apivoted shaft, D2, which is pivoted in a fuel-box, D, mounted on theoven B. In connection with the shaft Dl is employed a door or valve, D4,which is opened by the turning of 'the lever B4, so as to deposit anadditional supply of wood upon the chain C simultaneously with theopening of the hinged door B3 and the turning of the chain C, to supplythe ire with acharge of `fuel.. Thus the up-` perportion of the chain Cdischarges aquan tity of wood at one end and receives a supply at theother. The oven B is formed with additional interior-walls, B5, betweenwhich and .the furnace,

conducted into the furnace pipe, E', which communicates with the spacebetween the wall B5 and the' outer .walls of the oven B through anopening, E2, Fig. 4. EJ represents a tuyere leading into the stack E atasuitable point belowthe juncture of the stack E and pipe E', and adaptedto receive and directa blast of air for the purpose 0f forcing into thepipe'E the escape heat (which rises in the stack E, to insure theeffectual accomplishment of which I employ a deillector, y

E4. The escape heat, beingthus conducted into the pipe E', istherebycondueted intothe space between the walls of the oven B, for thepurpose of generating sufficient heat in said oven to bake or char thewood contained thereln in such manner asto thoroughly dry y,the same andeliminate gas therefrom. Through thel V,inediuniof a tuyere, F,this/gas, together with the heated air from the stack E, may be forcedby a blast of air into a pipe,F, whereby it is A, means being thusprovided'for saving all moting the smelt-ing process. 'lheA pipe Egradually increases in width toward' its lower end,to equally distributethe heat and gas into the furnace. y i escape heat being readilyemployed for getting The apparatus 'admitslof the up steam or anyother'desired purpose.

The walls B5, while permittingthe requisite or nearly all the l heatgenerated inthe furnace and greatly proheating 'of the interior of theoven B, prevent \contact`withthe wood of anything from the 'smoke-stackE that might cause the wood to become ignited; and the oven B isdesigned to be constructed with suitable ventages,` whereby the heattherein may be reduced .when desired.

The bars of the fire-grate A may, 'if ,de-s

'sired, be formed of hollow cylinders, so as to p constitute boilers tocontain water for generating steam', and at the same time prevent inA Ajury to the grate-bars bycontact with the-fire.

, Having thus described my invention, the following is what lclaimasnewtherein and desire to securebyLetters Patent:

1. In combination with the furnace A, the

fuel department or ovenB, containing afeedingchain, C, the whole beingconstructed and arranged to operate-substantially in the man-`l nerherein set-forth. y

2. In combination with the oven B, constructed with double walls in themanner described, the'pipe E and tuyere E, adapted to j be employed inconnection with a blast yof air' to convey the .escape heat to thepurpose set forth.- v

3. Forcing into the s1nelting-furnace A the gas eliminated from-the woodand the heated air conveyed from the stack E by the employthe ovenB,'for

nient of the tuyere F and'pi'pe` F', substantially asland for thepurposes explained.

The above specification of my Aimproved smelting-furnace signed this11th `day of Feb; ruary, 1864.

ELIPHALET HALL.

Witnesses:

C. E.L. DU Bois, p G. D. SMITH.

